<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes" />
    <title>ShellCheck: SC2093 – Remove `exec ` if script should continue after this command.</title>
    <link rel="stylesheet" href="css/bootstrap.min.css" />
  </head>
  <body style="margin-left: auto; margin-right: auto; max-width: 800px">
    <h1>SC2093 – ShellCheck Wiki</h1>
    <a href="https://github.com/koalaman/shellcheck/wiki/SC2093">See this page on GitHub</a>
    <p style="display: none"><a href="index.html">Sitemap</a></p>
    <hr />
    <h2 id="remove-exec-if-script-should-continue-after-this-command">Remove
<code>exec</code> if script should continue after this command.</h2>
<h3 id="problematic-code">Problematic code:</h3>
<div class="sourceCode" id="cb1"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb1-1"><a href="SC2093.html#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> <span class="st">&quot;Starting compilation&quot;</span></span>
<span id="cb1-2"><a href="SC2093.html#cb1-2" aria-hidden="true" tabindex="-1"></a><span class="bu">exec</span> ./compile</span>
<span id="cb1-3"><a href="SC2093.html#cb1-3" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> <span class="st">&quot;Starting deployment&quot;</span></span>
<span id="cb1-4"><a href="SC2093.html#cb1-4" aria-hidden="true" tabindex="-1"></a><span class="bu">exec</span> ./deploy</span></code></pre></div>
<h3 id="correct-code">Correct code:</h3>
<div class="sourceCode" id="cb2"><pre class="sourceCode sh"><code class="sourceCode bash"><span id="cb2-1"><a href="SC2093.html#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> <span class="st">&quot;Starting compilation&quot;</span></span>
<span id="cb2-2"><a href="SC2093.html#cb2-2" aria-hidden="true" tabindex="-1"></a><span class="ex">./compile</span></span>
<span id="cb2-3"><a href="SC2093.html#cb2-3" aria-hidden="true" tabindex="-1"></a><span class="bu">echo</span> <span class="st">&quot;Starting deployment&quot;</span></span>
<span id="cb2-4"><a href="SC2093.html#cb2-4" aria-hidden="true" tabindex="-1"></a><span class="ex">./deploy</span></span></code></pre></div>
<h3 id="rationale">Rationale:</h3>
<p>The script contains an <code>exec</code> command followed by other
commands in the same block. This is likely an error because the script
will not resume after an <code>exec</code> command.</p>
<p>Instead, "exec" refers to the Unix process model's idea of execution
(see <a
href="http://man7.org/linux/man-pages/man2/execve.2.html"><code>execve(2)</code></a>),
in which the current process stops its current program and replaces it
with a new one. This is mainly used in wrapper scripts.</p>
<p>To execute another script or program and then continue, simply drop
the <code>exec</code> as in the example.</p>
<h3 id="exceptions">Exceptions:</h3>
<p>If the code after the <code>exec</code> is only there to handle a
failure in executing the command you can ignore this warning. For this
reason, ShellCheck suppresses the warning if <code>exec</code> is only
followed by <code>echo</code>/<code>exit</code> commands.</p>
<h3 id="related-resources">Related resources:</h3>
<ul>
<li>StackOverflow: <a
href="https://stackoverflow.com/questions/3877657/my-shell-script-stops-after-exec">My
shell script stops after exec</a></li>
</ul>
    <hr />
    <p style='font-size: 80%'><a href="../index.html">ShellCheck</a> is a static analysis tool for shell scripts. This page is part of its documentation.</p>
  </body>
</html>


